<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="css/index.css">
</head>
<body>
<div class="tiler">
    <img src="images/a1.png"/>
    <div class="tiler-overlay" data-image="images/a1.png"></div>
</div>

<div class="tiler">
    <img src="images/a2.png"/>
    <div class="tiler-overlay" data-image="images/a2.png"></div>
</div>

<div class="tiler">
    <img src="images/a3.png"/>
    <div class="tiler-overlay" data-image="images/a3.png"></div>
</div>


<div class="tiler">
    <img src="images/a4.png"/>
    <div class="tiler-overlay" data-image="images/a4.png"></div>
</div>


<div class="tiler">
    <img src="images/a5.png"/>
    <div class="tiler-overlay" data-image="images/a5.png"></div>
</div>


<div class="tiler">
    <img src="images/a6.png"/>
    <div class="tiler-overlay" data-image="images/a6.png"></div>
</div>
</body>
</html>
<script src="js/index.js"></script>